Add bench-on parameter to use benchmarks from PR

[JoshuaLampert]

To use the benchmark script as explained in MilesCranmer/AirspeedVelocity.jl#97 (comment).

[github-actions]

Benchmark Results (Julia v1.10)

Time benchmarks

	main	cc172ce...	main / cc172ce...
bbm_1d/bbm_1d_basic.jl - rhs!:	13.8 ± 0.31 μs	13.8 ± 0.27 μs	0.998 ± 0.03
bbm_1d/bbm_1d_fourier.jl - rhs!:	0.215 ± 0.0093 ms	0.527 ± 0.25 ms	0.408 ± 0.19
bbm_bbm_1d/bbm_bbm_1d_basic_reflecting.jl - rhs!:	0.0803 ± 0.0004 ms	0.0804 ± 0.00038 ms	0.999 ± 0.0069
bbm_bbm_1d/bbm_bbm_1d_dg.jl - rhs!:	0.0345 ± 0.0005 ms	0.0341 ± 0.00086 ms	1.01 ± 0.029
bbm_bbm_1d/bbm_bbm_1d_relaxation.jl - rhs!:	27.4 ± 0.45 μs	27.5 ± 0.66 μs	0.999 ± 0.029
bbm_bbm_1d/bbm_bbm_1d_upwind_relaxation.jl - rhs!:	0.0484 ± 0.00063 ms	0.0484 ± 0.00076 ms	1 ± 0.02
hyperbolic_serre_green_naghdi_1d/hyperbolic_serre_green_naghdi_dingemans.jl - rhs!:	4.35 ± 0.04 μs	4.43 ± 0.05 μs	0.982 ± 0.014
kdv_1d/kdv_1d_basic.jl - rhs!:	1.52 ± 0.03 μs	1.4 ± 0.02 μs	1.08 ± 0.026
kdv_1d/kdv_1d_implicit.jl - rhs!:	1.7 ± 0.03 μs	1.4 ± 0.011 μs	1.21 ± 0.023
serre_green_naghdi_1d/serre_green_naghdi_well_balanced.jl - rhs!:	0.202 ± 0.0085 ms	0.199 ± 0.0085 ms	1.02 ± 0.061
svaerd_kalisch_1d/svaerd_kalisch_1d_dingemans_relaxation.jl - rhs!:	0.148 ± 0.0051 ms	0.144 ± 0.0038 ms	1.03 ± 0.045
time_to_load	2.03 ± 0.01 s	2.01 ± 0.02 s	1.01 ± 0.011

Memory benchmarks

	main	cc172ce...	main / cc172ce...
bbm_1d/bbm_1d_basic.jl - rhs!:	1 allocs: 4.12 kB	1 allocs: 4.12 kB	1
bbm_1d/bbm_1d_fourier.jl - rhs!:	1 allocs: 4.12 kB	1 allocs: 4.12 kB	1
bbm_bbm_1d/bbm_bbm_1d_basic_reflecting.jl - rhs!:	5 allocs: 1.17 kB	5 allocs: 1.17 kB	1
bbm_bbm_1d/bbm_bbm_1d_dg.jl - rhs!:	10 allocs: 8.62 kB	10 allocs: 8.62 kB	1
bbm_bbm_1d/bbm_bbm_1d_relaxation.jl - rhs!:	2 allocs: 8.25 kB	2 allocs: 8.25 kB	1
bbm_bbm_1d/bbm_bbm_1d_upwind_relaxation.jl - rhs!:	2 allocs: 8.25 kB	2 allocs: 8.25 kB	1
hyperbolic_serre_green_naghdi_1d/hyperbolic_serre_green_naghdi_dingemans.jl - rhs!:	0 allocs: 0 B	0 allocs: 0 B
kdv_1d/kdv_1d_basic.jl - rhs!:	0 allocs: 0 B	0 allocs: 0 B
kdv_1d/kdv_1d_implicit.jl - rhs!:	0 allocs: 0 B	0 allocs: 0 B
serre_green_naghdi_1d/serre_green_naghdi_well_balanced.jl - rhs!:	0.075 k allocs: 0.66 MB	0.075 k allocs: 0.66 MB	1
svaerd_kalisch_1d/svaerd_kalisch_1d_dingemans_relaxation.jl - rhs!:	0.042 k allocs: 0.315 MB	0.042 k allocs: 0.315 MB	1
time_to_load	0.153 k allocs: 14.5 kB	0.153 k allocs: 14.5 kB	1